Improvement in low-water indicators



tittdr taia @mit @dat FREDERICK VRAYNSFORD, OFA GRAND RAPIDS, MICHIGAN, ASSIGNORTO HIMSELE AND C. L. BOUCHARD, OF SAME PLACE.

Letters Patent No. 108,828, dated'november 1, 1870.

- IMPROVEMET IN LOW-WATER INDICATCR'S.

The Schedule referred to in these Letters Patent and making peut of the same.

Z'o all whom't't may concern;

Be it known that I, FREDERIGK RAYNsFonD, of Grand Itapids, in the county of? Kent and State of Michigan, have inventeda new and valuable'Improvefment in Low-water Indicators forSteam-Boilers; and I do lrereby declare thatthe following is a full, clear, and exactjdescription of the construction and opera-4 tion of the same, reference being had to the annexed drawing making a part of this specification and to the letters and figures of reference marked thereon.

Figure l of the drawing isa representation of a central vertical section of my invention, showing the operation above low water.

Figure 2 is af similar' sectional view, showing the position of theparts at or below the low'f'water line.

YMy invention relates to automaticalarms for indicating low water in steam-boilers, and consists, chiefly,l

. in ,the construction and novel arrangement of devices;

whereby the floats are attached to the-valve-rod which opens the throttle of the alarm-whistle.

The letter A of the drawingdesignates a lsteamwhistle attached to the upper part of a steam-boiler.

B represents along lever, to one end of which is attached a float, O, by means of a chain, y

To the other end of the lever; B a similar oat, D', is attached by means of 'a chain, a', passing over a pulley, b.

E represents a connterbalancing-Weight, attached to that end of the leverB which should descend when the weight of the suspended floats is supported by the water in the boiler.

F represents a forked support secured to the'uppel' part ofthe boiler.

The lever B is pivoted or hinged to this support or hanger, and immediately above it is'pivoted to the same hanger a short lever, Gr.

The short arm of the leverG is attached to the end of the valve-rod c, which operatesthe throttle-valve of the steam-whistle.

This valve may be closed by means of a coiled spring, e, or the 'long arm of the lever G may be weighted, to produce the same effec-t.

` H is a stop attached to the long arm of the lever G,and` designed to prevent the long arm of the lever B from rising above the pulley, and the valve-rodffrom' being drawn downward more than may be necessary.

The valvelrod c and stop H may be attached dif rectly to the lever B, and the lever G dispensed with.'`

.The levers are employedV and thus arranged to secn're po/wer and certainty of action. Forthe same reason, two floats are employed instead of one. when the powerthus obtained is suiicient to open the valve, asingle oat may be employed, and it may be suspended from the valve-rod itself', as shown in Figure 3.

The chief object thus designed tube accomplished is", to keep the valve-rod and its cennections stationary un-V til the low-water point' is reached, and then to secure 2. In combination with-the valve-rod c, closing the throttle when operated bythe coil-spring e or weighte ed lever Gr, the combined iioat and weight O, suspended from the valve-rod by a chain, d, and arranged to operate as and for the purposes specified.

In testimony'that I claim the above, I have hereunto subscribed my name in the presenceof two witnesses.

' FREDERICK BAYNSFORD. Witnesses E. W. ANDERSON, HENDERSON WILLARD.

But,

purpose of in'fli- 

